World number two Naomi Osaka confirmed for Montreal event in August

FILE - In this Wednesday, Jan. 22, 2020, file photo, Japan's Naomi Osaka reacts after defeating China's Zheng Saisai in their second round singles match at the Australian Open tennis championship in Melbourne, Australia. [AP Photo/Andy Brownbill, File]

World number two Naomi Osaka, who withdrew from this year's French Open and Wimbledon on mental health grounds, will compete in Montreal next month, organisers of the Canadian event said on Wednesday.

Osaka, a four-time Gland Slam champion who is one of Japan's best gold medal prospects at the Tokyo Olympics, will be part of a field at the Aug. 9-15 U.S. Open tune-up that currently features 18 of the WTA's top 20 players.